Please check my Bridgeport
12-22-2007, 06:21 PM
#11
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Originally Posted by Lynn E. Hanover' post='890530' date='Dec 20 2007, 06:19 PM
Yes, bevel the edge of the closing line, but a bevel is a 45 degree angle. You want the "bevel to be round, as in a segment of a circle. Use a small file to round off the corner all along the line and a bit into the corners. Then sand smooth with 80 grit wet or dry paper (Silicone Carbide) wet with oil.
Then polish with a Dremel and a felt disc and carborundem paste. Comes in a stick from Sears. In typical ports the trailing end of the side seal is unsupported crossing the port opening and the polished radius geatly extends the life of the side seal.
Lynn E. Hanover
This picture is of a port I had just started and I have scribed the leading end track of the side seal
(on the bridge) and the trailing end scribe you will notice falls off of the iron and then comes back on near the top of the port. To the left is my see through rotor.
Then polish with a Dremel and a felt disc and carborundem paste. Comes in a stick from Sears. In typical ports the trailing end of the side seal is unsupported crossing the port opening and the polished radius geatly extends the life of the side seal.
Lynn E. Hanover
This picture is of a port I had just started and I have scribed the leading end track of the side seal
(on the bridge) and the trailing end scribe you will notice falls off of the iron and then comes back on near the top of the port. To the left is my see through rotor.
Alright Lynn, I opened up the main port just a tad to RB template specs and rounded and beveled the closing line more. Let me know what you think.
I also ported my exhaust more with the RB race exhaust template. Let me know what you think on this as well.
Jarrett
12-22-2007, 07:35 PM
#12
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Location: Central Ohio (Hebron) Zephyrhills Fla.
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Originally Posted by ultimatejay' post='890614' date='Dec 22 2007, 05:21 PM
Alright Lynn, I opened up the main port just a tad to RB template specs and rounded and beveled the closing line more. Let me know what you think.
I also ported my exhaust more with the RB race exhaust template. Let me know what you think on this as well.
Jarrett
I also ported my exhaust more with the RB race exhaust template. Let me know what you think on this as well.
Jarrett
The intake is still fine, and the exhaust is more than adequate. Don't make it any bigger.
Lynn E. Hanover
12-23-2007, 12:06 AM
#13
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Originally Posted by Lynn E. Hanover' post='890618' date='Dec 22 2007, 05:35 PM
The intake is still fine, and the exhaust is more than adequate. Don't make it any bigger.
Lynn E. Hanover
Lynn E. Hanover
Thanks. The exhaust is a RB race port. Is it too big? My exhaust system is RB road race header that goes right into a 3"collector and then 3" all the way back to a RB stainless high flow muffler. Do you think this will be a good combo?
12-24-2007, 01:09 AM
#14
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Originally Posted by ultimatejay' post='890629' date='Dec 22 2007, 11:06 PM
Thanks. The exhaust is a RB race port. Is it too big? My exhaust system is RB road race header that goes right into a 3"collector and then 3" all the way back to a RB stainless high flow muffler. Do you think this will be a good combo?
For long runs at full throttle, as in road racing, the RB headers last longer with a 2 1/2" or 3" hose blowing air on them. Even the thick walled tubes in carbon steel give up after a while.
If you build your own, use stainless.
The exhaust port shape and size has little affect in street use. The mufflers tend to blunt the performance improvements.
Lynn E. Hanover
12-24-2007, 06:55 PM
#15
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Originally Posted by Lynn E. Hanover' post='890690' date='Dec 23 2007, 11:09 PM
For long runs at full throttle, as in road racing, the RB headers last longer with a 2 1/2" or 3" hose blowing air on them. Even the thick walled tubes in carbon steel give up after a while.
If you build your own, use stainless.
The exhaust port shape and size has little affect in street use. The mufflers tend to blunt the performance improvements.
Lynn E. Hanover
If you build your own, use stainless.
The exhaust port shape and size has little affect in street use. The mufflers tend to blunt the performance improvements.
Lynn E. Hanover
My muffler is 3" in and out and has very very little backpressure. I'll post a vid when I get it running so you can see. It's basically 3" all the way back open exhaust.
01-03-2008, 09:47 AM
#16
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I have a question (probaly a stuped).. I have the RB streetpot templates both intake and exhause for a S5 engine (turbo2 4 port).. now so I have a template for the seconday ports.. but none for the small f-primary ports.. so is it meant to leave them untouched?
01-03-2008, 12:14 PM
#17
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Originally Posted by Rub20B' post='891406' date='Jan 3 2008, 07:47 AM
I have a question (probaly a stuped).. I have the RB streetpot templates both intake and exhause for a S5 engine (turbo2 4 port).. now so I have a template for the seconday ports.. but none for the small f-primary ports.. so is it meant to leave them untouched?
You use the same streetport template for all the intake ports. I think some people don't go as large on the primary ports to give more low end boost.
01-03-2008, 09:25 PM
#20
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Originally Posted by Rub20B' post='891414' date='Jan 3 2008, 11:21 AM
So in principe you make the primaries and secondaries equal.. (considering this is for a boosted application) what about the runner size?
pineappleracing.com has templates with primary and secondary cut outs. you really only see that on a full out bridge port. im sure it would completly kill your low end making your primarys that large.